factorise when

.woodpecker/preprod.yaml

@@ -3,6 +3,8 @@ when:
   event: 
     - push
     - pull_request
+  branch: preprod
+
 
 steps:
   - name: HTML syntax check
@@ -18,15 +20,11 @@ steps:
       - tidy -q -e --drop-empty-elements no static/index.html
 
   - name: disable SEO indexing (on preprod only)
-    when:
-      branch: preprod
     image: debian:12 # Same as previous step to not have to download 2 images, but it could be any linux
     commands:
       - '[ -f static/robots.txt ] && echo "Disallow: /*"  >> static/robots.txt'
 
   - name: upload (preprod)
-    when:
-      branch: preprod
     image: plugins/s3
     settings:
       bucket: preprod-site